Tooth brush



July 12, 1938. w. A. DULLEA TOOTH BRUSH Filed June 5, 1957 I Inventor l Va/fer u ea Aiiqrneys Patented July 12, 1938 UNITED STATES PATENT OFFICE 7 TOOTH BRUSH Walter A. Dullea, Milton, Mass.

Application June 3, 1937, Serial No. 146,283

1 Claim. (01. 15-167) The present invention appertains to new and With the cluster 1 having its bristles of uniform useful improvements in dental instruments and length, in following the curve 6, a concavity dis more particularly to a tooth brush. afforded which will contact a number of teeth at The principal object of the present invention is a time when the outer side of the teeth are being 5 to provide a tooth brush wherein the head is cleaned. 5 formed in such a manner as to facilitate the On the other hand the cluster 8 in following the cleaning of both the inside and outside of the curve defines the convexityewhich will permit the teeth. brush to contact a plurality of the teeth when the Another important object of the invention is to inside of the teeth are being brushed.

10 provide a tooth brush constructed in such a man- It will be observed, that beyond the point I) 10 ner as to facilitate cleaning between the teeth in and toward the extremity c the bristle clusters addition to cleaning the inner and outer sides 1-8 are on substantially parallel planes with the thereof. handle proper and this portion of the brush can These and other important objects and advane be used when motion transversely of the rows of tages of the invention will become apparent to teeth is executed as when effort is being made to 15 the reader of the following specification. clean between the teeth.

In the drawing: While the foregoing specification sets forth Figure 1 represents an edge elevational view the invention in specific terms, it is to be underof the instrument. stood that numerous changes in the shape, size Figure 2 is a side elevational view. and materials may be resorted to without depart- 20 Referring to the drawing wherein like numerals ing from the spirit and scope of the invention as designate like parts, it can be seen that the hanclaimed hereinafter.

dle and head portions of the instrument are con- Having described the invention what is claimed structed of one elongated element, numeral 5 deas new is:-

noting the handle portion while numeral 6 desig- A tooth brush comprising a handle, including a 25 nates the head portion. hand grip portion and a head portion, said head The head portion is formed by bending the elonportion being provided with an offset portion pargated element from the point a laterally to the alleling the longitudinal axis of the hand grip point b and then extending the same on a line portion of the handle and merging with the hand substantially parallel to the handle proper. grip portion in a gradual curved portion, and 30 The bristles project laterally from opposite bristles on the head portion and extending unisides of the head 6, the cluster 1 for cleaning the formly from opposite sides thereof throughout outside of the teeth while the cluster 8 is intended the curved and offset portions of the head to for cleaning the inside of the teeth. provide a concaved set of bristles at one side of The clusters of bristles extend from the starting the head and a convexed set of bristles at the op- 35 point a of the curve to the extremity c and are of posite side of the head. uniform length. WALTER A. DULLE'A. 

